AP EAMCET202419 May 2024Evening ShiftPhysicsMagnetic Effects of CurrentActual
A wire shaped in a regular hexagon of side 2 cm carries a current of 4A. The magnetic field at the centre of hexagon is
Options
- A4 3 10⁻⁵ ~T
- B8 3 10⁻⁵ ~T
- C3 10⁻⁵ ~T
- D6 3 10⁻⁵ ~T
Correct answer
B. 8 3 10⁻⁵ ~T
Step-by-step solution
r = a 2 30^ = 3 a 2 = 3 ~cm Magnetic field at centre 0 , aligned & B=6 ₀ 4 I r (2 30^ ) & =6 10⁻⁷ 4 3 10⁻² 2 1 2 & =8 3 10⁻⁵ ~T aligned